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Multilayer-structured molded article

A technology of multi-layer structure and formed body, which is applied in the direction of layered products, synthetic resin layered products, packaged food, etc., can solve the problem of uneven thickness of the middle layer, achieve the elimination of uneven thickness, alleviate the drop of melt viscosity, prevent The effect of uneven thickness

Inactive Publication Date: 2019-05-21
TOYO SEIKAN GRP HLDG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the technology is not intended to prevent unevenness in the thickness of the middle layer that occurs when polyester such as PET is used to form the inner and outer layers and the middle layer
[0018] As mentioned above, as far as the applicant is aware, no research has been carried out on the problem that the same kind of polyester is used to form the inner and outer layers and is used to form the middle layer, but there is no such thing as a crystallization nucleating agent. Uneven thickness of the intermediate layer that occurs when additives are added to the intermediate layer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0218] The oxygen-absorbing resin pellets using the second ethylene terephthalate-based polyester resin (A2-1) were charged into a hopper of an injection machine for forming an intermediate layer. When the forming temperature of the intermediate layer was 260° C., a multilayer preform was formed by the method described above, thereby forming a multilayer blow molded bottle.

[0219] Table 1 shows the composition of the formed bottle, the forming temperature of the intermediate layer, the formability, the haze of the main body portion of the preform, and the haze of the main body portion of the bottle.

Embodiment 2

[0221] Except that the oxygen-absorbing resin pellets using the second ethylene terephthalate-based polyester resin (A2-2) were put into the hopper of the injection machine for forming the intermediate layer and the molding temperature of the intermediate layer was 240° C. Multilayer blow molded bottles were formed and measured in the same manner as in Example 1.

[0222] Table 1 shows the composition of the formed bottle, the forming temperature of the intermediate layer, the formability, the haze of the main body portion of the preform, and the haze of the main body portion of the bottle.

Embodiment 3

[0224] Except that the oxygen-absorbing resin pellets using the second ethylene terephthalate-based polyester resin (A2-3) were charged into the hopper of the injection machine for forming the intermediate layer and the molding temperature of the intermediate layer was 240° C. Multilayer blow molded bottles were formed and measured in the same manner as in Example 1.

[0225] Table 1 shows the composition of the formed bottle, the forming temperature of the intermediate layer, the formability, the haze of the main body portion of the preform, and the haze of the main body portion of the bottle.

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Abstract

A multilayer-structured molded article has inner and outer layers comprising a first ethylene terephthalate-type polyester resin, has an oxygen-absorptive middle layer containing a nonpolymeric organic oxygen absorbent, and is characterized in that the oxygen-absorptive middle layer additionally has a second ethylene terephthalate-type polyester resin containing relatively more copolymerized unitsthan the first ethylene terephthalate-type polyester resin and contains at least 5 mass parts of the nonpolymeric organic oxygen absorbent per 100 mass parts of the second ethylene terephthalate-typepolyester resin.

Description

technical field [0001] The present invention relates to an oxygen-absorbing resin composition containing an organic oxygen absorbent. More specifically, the present invention relates to a multilayered structural molded article including an oxygen absorbing layer using an oxygen absorbing resin containing ethylene terephthalate-based polyester resin and an organic oxygen absorbing agent as an intermediate layer The composition is formed. Background technique [0002] Due to the excellent characteristics of ethylene terephthalate-based polyester resins such as formability, transparency, mechanical strength, chemical resistance, and its relatively high gas barrier properties against gases such as oxygen, ethylene terephthalate Glycol ester polyester resins have been used in various fields as packaging materials such as films, sheets and bottles. In order to further improve the gas barrier properties of these packaging materials, the following multilayer structure has also bee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/36B29B11/06B29C49/22B32B27/00B65D65/40
CPCB29C49/22B32B27/36B32B1/02B32B7/027B32B27/18B32B27/08B32B2250/03B32B2250/244B32B2250/40B32B2250/44B32B2307/518B32B2307/7244B32B2307/738B32B2307/74B32B2439/60C08L67/02C08K5/3417B29C49/08B29C49/0005B29C51/002B29C51/14B29L2031/7158B29L2031/7132B29K2067/00B29C2049/023B32B2367/00B32B2439/00B29B11/08B32B9/04B29B11/06B32B27/00B29C49/06B65D65/40
Inventor 泽芳树山田俊树平山由纪子村松莞菜
Owner TOYO SEIKAN GRP HLDG LTD
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